Pumping apparatus for vacuum-cleaners and the like.



W. HKKELLERH' PUMPING APPARATUS FOR YAGUUM CLEANERS AND THE LIKE.

APPLICATION FILED JUNE 23, 1909. I I

vPatented May 3,1910;

A. lg i==rnw==ip= 3 m y 2 v w. H. KELLER. PUMPING APPARATUS FOR VACUUM CLEANERS AND THE LIKE APPLIUATION FILED JUNE 23, 1909. v

Patented May 3, 1910;

2 SHEETS-SHEET 2- connecting, rods are. mounted on cranks on ball bearings greatly reduced but there is a tion nozzle, the motor shaft moves longi- -ri'girlly connected with the follower-head the UNITED. STATES PATENT OFFICE.

WILLIAM H. KELLER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 KELLER MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

PUMPING APPARATUS FOR VACUUME-CLEANERS AND THE LIKE.

Specification of Letters Patent.

Application filed June 21!;1909. Serial No. 503,922.

To all whom it may concern:

Be it known that I, WILLIAM H. KELLER, i a citizen of the United States, residing in l the city and county of Philadelphia, State of Pennsylvania, haveinvented a new and useful Pumping Apparatus for Vacuum- Oleaners and the Like, of which the following is a specification.

In one type of pumping apparatus which is especially adapted for use in conjunction with vacuum cleaning apparatus it has heretoforebeen-proposed to employ a followerhead either of the piston or diaphragm type and to rigidly secure to this follower-head one end of a connecting rod, the other end of which is mounted on a shaft which latter is actuated by a suitable motor.

As is well known to those skilled .in the art to which this invention appertains, owing to variations in the load at the suctudinally in order'to automatically adjust the position of the armatures and it has been found in practice that when the load increases there is a tendency of the motor shaft to-move longitudinally in one direction and if one end of the connecting rod is.

connecting rod is unableto adjust itself to these conditions so that a much greater amount of current-is necessary in casean electric "motor is employed and the motor .becomes' overheated, with consequent injury thereto. It has also been found by numerous experlments that in cases wherein two op 'osite sides of the motor and the other en of the connecting rods ri idly secured to the follower-head that the. all bearings intermediate the crank and the connecting rod are subjected. to an enormous strain owing to the peculiar movement which the follower-head receives durin this reciprocation, it being remembered t at in practice thesedevices are run at. a. speed between twelve hundred and four thousand revolutions per minuteand it will be apparent that in such cases not only is the life of the liability of. either the fastening device for securing the connecting rod to the followerhead becoming broken or the end of the rod itself broken oif.

With the above in view my present invention consists of a pumping apparatus wherein I have overcome the disadvantages to which I have hereinbefore referred and in my present construction I employ. a connecting rod, one end of which is mounted on a crank actuated by the motor while the other end of the connecting rod is secured to the follower-head in such a manner that the connecting rod is permitted to move laterally relatively to they follower-head while at: the same time no .pivotal connection is formed at this point.

My invention further consists of a novel construction of a follower-head having a plurality of pins or their equivalents secured thereto with which the connecting rod is adapted to co-act. It further consists of a novel construction Patented May 3, 1910.-

of a connecting rod which preferably cornprises an integral piece of material one end of which is adapted to be secured to a crank while the other end thereof is provided with ..a plurality of openings through which pass fastening devices to secure the same with respect to the follower-head.

It further consists of other novel features of construction, all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, I have shown in the accompanying drawin s one form thereof which -1s at resent pre erred by me, since the same has een found in practice Y reliable results, although it is to .be under to give satisfactory and stood'that' the various instrumentalities of i which in invention consists can be variously arrange and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities' as herein set forth.

Figure 1 represents a sectional elevatlon of a umping apparatus for vacuum cleaners emliodyin my invention Fig. 2 re resents a sectiona elevation of a portion 0 Fig. 1. Fig. 3 re resents a plan view of the followerhead in etached osition. Fig. 4 represents an end view of ig. 3.- Fig. 5 represents a sectional elevation of a port on of the device showing the manner in which the connecting rod isisecured with respect to the followerhead', certain portions ofthe device having been omitted for the sake of clearness of t illustration.

Similar numerals of reference indicate corres onding parts in the figures.

eferring to the drawings :-For the urposes of illustration I have preferred to s 'ow' my novel pumpin tion with a well own type of vacuum cleaners many thousands of which are now on the market and I will only briefly refer to the vacuum cleaning mechanism in order that the complete operation of the device may be clearly understood and in order to more clearly set forth the marked advantages of my construction. 1 designates a pum casing which is rovided with a remova le bottom 2 whic if desired may be provided with suitable rollers, said bottom being secured with re- 'spect to the main body port-ion of the casing 1 by means of suitable fastening devices 3, which interlock with lugs 4, carried b said body portion. The casing 1 is provide wit-h a cover 5 which is seated on a dust bag ring 6 mounted on the top of the casing, suitable packing material'being-provided in order to form an air tight engagement between the cover '5 and the casin 7 designates fastening devices by means of which the cover is jremovably secured to the casing 1..

The pum ing mechanism comprises a casing 8, whic is mounted on standards 9, carried by the base 2, and the pumping mechanism is provided with a pumping chamber -10, which divides the pump easing into a vacuum reservoir 11, and a pressure reservoir The dust laden air enters through the anlnlet 13, in the cover 5, and'pas'ses' through the filtering mechanism .14 1n the vacuum reservoir 11, passing thence through the aperture 15 and through the apertures pin the apertured plate 16;"then through the apertures in the flexible valve 17 into the pumping chamber 10 it being noted that the "apertures in the valve 17 are in the present instance stag 'ered with respect to the'apertures in thep ate16.

The follower-head 18 has secured ereto anapertured metal plate 19 to whi h the diaphragm 20 is secured, it being see that the outer periphery ofythe diaphragm is fixedly secured with respect to: the casing 1 by means of the. annulus 21 andthe, fastening devices 22, the outer periphery of the diaphragm preferably extending outwardly 6 in order that it may serve as a packing to prevent leakage of air from the vacuum com artme'nt to the pressurgcoinpartment.

T e dia hra 201s provided with aper- .'t ures 23 t eret rough which are staggered with respect to the apertures rn the plate 19.

i I r apparatus in conjunc therefore to be limited to. a construction wherein two connecting rods are employed.

The follower-head 18 is rovidedon opposite sides in the resent instance, with a y e endin iian e or racket 24 whichis provi ed wit -a ,p urality of apertures 25. 26 designates pins or their equivalents which are suitably secured within the apertures 25 the ends of such pins extending outwardly beyond the bracket 24 and having mounted thereon a bushing 27 of any desired type.

28 designates a connecting rod one end of which is provided with an enlarged head 29 in which are located a plurality of apertures 30, which when the parts are in assembled position engage the bushings 27 on' the pins 26. The opposite end of each connecting rod 28 is preferably provided "with a split collar 31, and with suitable fastening devices 32, whereby the connecting rod may be suitrace ably secured to a crank 33. mounted on a shaft 34 which is driven lfy a motor 35 car-' ried by the base 2, whereby when the motor is actuated the diaphragm 20 will. be given a combined reciprocatoryand oscillatory movement so that air will be drawn in through the inlet 13, into the vacuum compartment 11, thence into the pumping chamber 10 and into the pressure compartment 12 the .air discharging from the pressure oornpartment 12 through the main exhaust port 36 to the atmosphere orother desired point of utilization.

As the load varies at 'the suctionnozzle the armatures on the motor shaft'will autorod with'respect to the follower-l ked there will be no strain on the motor-such as is the case when the end of the connectin rod is rigidly secured to the follower-head, 1t being apparent to those skilled in this art,- that as the lower end of the connecting rod is moved laterally the upper end may also move a lateral direction with respect to the v.1501- lower-head so that the overheating of the motor, which arises in cases wherein the connectin rod 'is rigidly secured to the followeread, is entirely obviated.-

matically position themselves and owing to my novel manner of secgring the. connecting herein shown and'described, and it is to be understood that my claims to these features tion.

are to be interpreted with corresponding shown the connectlng rod as being provided with a-splitcollar and mounted on the ball bearings mountdd on the crank, it will be apparent that the connecting rod may be otherwise adapted to be secured to the crank and still be within the scope of my lIIVQII-x It has been found in practice that a very great saving in amount of current necessary to operate the motor is produced'when the conneetin rod is secured to the followerhead in t e manner herein described whereby I. am enabledto greatly reduce the cost of operating the cleanin apparatus.

It is to be understo that while in the present instance-I have, shown the movable member of they pum ing mechanism as comprising a followeread to which the diaphragm is secured, that .the follower-head may e in the formof 8.3)l8l3011 having packing securedthereto, an it is to be understood that in'the claimsthe term follower head is intended 'to include botha diaphragm ora piston.

I am aware that it has. heretofore been proposed to provide means for. permitti g 10h itudinal movement of an electric, motor sha t relatively to an alining driven shaft and I am also aware that it has heretofore been proposed in the patent to John W.

I Smith, No. 921, 32, granted May 11th, 1909,

to employ a connecting rod actuated by a motor shaft and having a rigid connection to an apertured plate or follower-head butmy present invention is differentiated from the aforesaid prior art, since I employ connecting means between the portion ofthe follower juxtaposed to the end of the connecting' rod which is constructed to admit of lateral movement of the end of said connecting rod. parallel to the longitudinal movement ofthe motor shaft, wh ch construction permits the necessa lateral/flay for said connecting rod or re and uces the expense of breakage to. minimum. M in differentiatedvention is therefore. clearl from L-the devices herein .a W mentioned and to none of the constructions of the pr or art do I herein make my claim.

It will now beapparent that I have devised'a novel and useful construction of a pumping apparatus for vacuum cleaners and the like which embodies the features of ad-' vantage enumerated desirable in the statement of the inventi' and the above de scription, and while Iha've in-the resent 1nstaneeshown and described apre erred em- I t thereof which has been found in prabtice to give satlafato and reliable res'ults ,itistob'eund thatthe'sameis or scope of the invention or sacrificing any of. its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a pumping mechanism, the combination with a motor, a motor shaft capable of limited longitudinal m'ovement in its bearings, and a reciprocating follower for the pumping mechanism, of a connecting rod connected to the motor shaft to be actuated by the same in a plane at a right angle to it and having one end in juxta position to the follower, and connecting means between said end and the follower and constructed to admit of movement of the end of the connecting rod parallel to the longitudinal the follower, and a pin common to the .fol-

lower and connectm rod and parallel to the motor shaft an havinglongi-t'ndinal play in one of said elements, whereby the connecting rod will be permitted to follow the longitudinal .movement of the shaft while maintaining its operative connection with the follower and whereby relative pivotal movement between the connecting-rod and follower is prevented.

3. In a umpmg mechanism, the combination with a motor and a motor-shaft capable of longitudinal movement inits bearlugs, of a-reciprocating follower for the pumping mechanism, a eonnecting-rodoonnected to the motor-shaft to 'be' actuated by the same and having 'one end adjacent to the follower, and a plurality ofspins common to the follower and connecting-rod and parallel to the motor-shaft and having lon Y lay in one of said elements,

gitudinal -whereby t e connecting rod will be perv 'tudinal movement of the shaft and pivota movement. between 't-he follower and connecting-rod will be premitted to follow the'lo 4. In a umpingmechamsm the eomble nation wi a motor, a motor and-a follower fpr the ump ing mechanism,"o a oonn connected to the motor shaft tobe actuated by 1 20" t ap b of longitudinal movement in its' bearings the mama plane at a right angle to it.

and having one endadjacent to the follower, 'an'da' pin rejecting from the follower parallel .to a motor and engaging an opening-inthe connecting rod to admit of the latter following the longitudinal play of the motor shaft while malntaining its operative connection with the follower and preventin relative ivota-l movement between the ollower an con necting rod. I p

5. In a umping mechanismthe combination witli a motor, a motor-shaft capable oflongitudinal movement in its bearings, and a reciprocating follower for the ump ing mechanism, "of a connecting-r connected to the motor-shaft to be actuated by the same and. having one end adjacent to the follower and formed with a plurality of openings, and a pluralityof pins projecting from the follower parallel to the motor shaft and engaging the o enings in the conmeeting-rod to admit of t e latter followin the longitudinal play of the motor-she;

and to prevent pivotal movement by the connecting-rod in its relation to the foll wer.

6. In a pumping mechanism, the combination with a meter, a m0tor-shaft capable of longitudinal m6 ent in its-bearings and formed.; with craii s at its ends and a follower for the pum 'ing mechanism, of

connectingerodxconnected to and actuated by said cranks and having their ends adjaeent' to diametrically opposed points of the follower and formed each with two openings, and two pairs of pins pro'ectin at diametrically o 'posite pdi' nts of t e fo lower and pa'ralle to the motor-shaft -kan'd engaging respectively 11 I e openings inthe connecting-rods where yq'said rode will have lay in relation to? the follower and with t e lon itudinal-movementof' theme- 'tor-shaft Whl e maintaining non pivotal connection with the follower. Y

7. In a device of thechar'adter named, the

combination of 'a'casing having a pumping chamber therein; a diaphra m having its outer periphery rigidlysiippo'rted end'jclos in o e side of said 'pii'nip'in chamber; a to er-hea-d' secured=t said follower-head mid -d phrag-m 'hav'ing valve eontrolledpoite the a plflrality of pinscarriije'd "mdifollowewh ad, a c nnectin red-haven plur alit (if-a ercures fiengag ng said pink some ave-rel tive movement w'itlnreepeccg' is mounted, and a niotofi for aetnating siiiil crank. Witnesses:-'.

sai diaphragm, 

